Answer:
D) secrete a cytokine that triggers apoptosis
Explanation:
Cytotoxic T cells also known as killer cells are lymphocytes that can kill foreign cells (also cancer cells, damaged and infected cells). They express specific type of receptors called T-cell receptors (TCRs) which recognize antigen of foreign cells. Cytotoxic T cells release cytotoxins such as perforin and granzymes and their role is to trigger the signal cascade in the target cell that will lead to apopotsis.
Answer:
Actually, polluted caves endanger water supplies and wildlife. Caves are home to some of the planet's most unusual creatures and important drinking water supplies. Now these underground resources are being polluted by surface activities, ranging from sewage spills to old factories. Most of the animals go on adaptation way which is a way an animal's body helps it survive, or live, in its environment. Even camels have learned to adapt (or change) so that they can survive. Animals depend on their physical features to help them obtain food, keep safe, build homes, withstand weather, and attract mates.
Because the cell theory is technically correct. So why would the cell theory be disapproved if it is accurate?
<span>A prominence is a bright arched cloud of ionized gas in the chromosphere and corona of the Sun. It is mostly contained in the sun's magnetic field. A solar flare, however, is a ejection of mass from the sun that actually comes in contact with the rest of the solar system.
I think this will help you "</span><span>Think of solar prominence as the Sun stretching out its gas components to a length that can reach thousands of kilometers... solar flares are similar to this only that it snaps at the peak of its stretch... solar prominences are usually harmless... nobody would want a solar flare to happen as this will entail a damaging surge of energy... coronal mass ejections [are] more powerful and therefore more harmful to Earth life..."
Hope I helped you</span>